[antlr-interest] Match A with exception of B .....how do I do that?

[Vlastimil Adamovsky]

Thanks,
 
the problem is something like this:
.......
 
Identifier     : (Letter | '_') (LetterOrDigit | '_')* ;
 
ReservedIdentifier  : PseudoVariableReference | ConstantReference;

PseudoVariableReference  : 'self' | 'super' | 'thisContext';
 
ConstantReference : 'nil' | 'false' | 'true' ;
 
ConstantReference
 : 'nil' | 'false' | 'true'
 ;
 
PseudoVariableReference
 : 'self' | 'super' | 'thisContext'
 ;
 
ReservedIdentifier
 : PseudoVariableReference | ConstantReference
 ;
 
BindableIdentifier : Identifier  -  ReservedIdentifier ;  //this is EBNF notation

How do I set up a BindableIdentifier rule so it is valid for ANTLR??
 
I have to admit, I just started using ANTLR and I like it a lot, but still, I think the learning curve is very steep....
 
Thanks,
  Vlastimil 


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.antlr.org/pipermail/antlr-interest/attachments/20090222/aa427fa8/attachment.html